fix(validation): allow agentic entries in evals/multinode_evals fields

ChangelogMatrixEntry.evals only accepted SingleNodeMatrixEntry, causing
agentic-coding configs to fail validation with "Extra inputs not permitted"
for fields like kv-offloading, duration, scenario-type.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: seungrokj

utils/matrix_logic/validation.py

@@ -889,8 +889,8 @@ class ChangelogMatrixEntry(BaseModel):
                       ] = Field(default_factory=dict)
     multi_node: dict[str, list[Union[MultiNodeMatrixEntry, MultiNodeAgenticMatrixEntry]]
                      ] = Field(default_factory=dict)
-    evals: list[SingleNodeMatrixEntry] = Field(default_factory=list)
-    multinode_evals: list[MultiNodeMatrixEntry] = Field(default_factory=list)
+    evals: list[Union[SingleNodeMatrixEntry, SingleNodeAgenticMatrixEntry]] = Field(default_factory=list)
+    multinode_evals: list[Union[MultiNodeMatrixEntry, MultiNodeAgenticMatrixEntry]] = Field(default_factory=list)
     changelog_metadata: ChangelogMetadata